Frame for sewing-machines



(No Model.)

J. M. BROSIUS. FRAME FOR SEWING MAGHINES.

No. 424,854. Patented Apr. 1; 1890.

. l I g l I 1 J12. (Wm 344%mloz V M John MEruszus- UNITED STATES PATENTOFFICE.

JOHN M. BROSIUS, OF ATLANTA, GEORGIA.

FRAME FOR SEWlNG-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 424,854, dated April 1,1890.

,. Application filed August 31, 1889. fierial No; 322,602. (No model.)

To all whmn it may concern:

Be it known that 1, JOHN li'lOMAN BROsIUS, a citizen of the UnitedStates, residing at Atlanta, in the county of Fulton and State ofGeorgia, haveinvented certain new and useful Improvements inSewing-Machine Frames; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form a part of this specification.

This invention relates to the construction of sewing machine frames, theobject being to make them lighter, more substantial, and at a less cost.

The invention consists of such details as will. be hereinafterdescribed.

In the accompanying drawings, Figure 1 is a central longitudinalvertical section showing the interior of the arm and most of the detailsof construction. Fig. 2 is a horizontal section through the arm 011 theline no 00, Fig. 1. Fig. 3 is a cross-section through the arm andbed-plate on the line 3 y, Fig. 1. Fig. 4: is a front View of theoverhanging end of the arm, the face-plate being removed.

For the purpose of illustrating my invention, I have shown theconstruction that would be necessary for the form of sewingmachine frameshown in my previous appli cation for Letters Patent, Serial No. 283,554for an improvement in sewing-machines, the requirements being for ahorizontal needledriving shaft, a vertical rocking shaft to drive theshuttle, a common faceplate, and provision for attaching theshuttle-race and feeding mechanism. I have also shown the upright partof the arm as provided for a train of gears to drive the operativeparts.

In the several figures like reference marks indicate corresponding partsin the several views.

A is the base-plate, B the arm, and (l the face-plate The base-plate ismade from a piece of malleable metal. The frame, as here shown, isprincipally constructed from sheet metal, preferably steel-that is tosay, what might properly be called the frame of the head is made fromsheet metal braced and held together by blocks and rivets, as will behereinafter described.

The sheet metal used in the construction should be comparatively thinsay about one sixteenth of an inch in thickness. The base plate shouldbe from such metal, and should be flanged on the edges, as shown in thedrawings, for the purpose of giving it the required stiffness, andshould be set up slightly in the vicinity of the needle-opening, asshown in Fig. 1., either in a circular or rectangular form, in thelatter case extending across the bed-plate. The shuttle-race D isattached to the bed plat-e, preferably by riveting, as should also bethe necessary fixed parts of the feeding mechanism and the hinges. Thearm B is struck up in two parts from sheet metal, which form theexterior parts of said arm. The two parts A are shown in section inFigs. 2, 3, and a. The two sides thnsformed and having continuouscontact on their edges are held together by rivets a, a, and 01.,passingthrough the sides and through the inserted pieces E and F. A greater orless number of these rivets may be used, according to the requirementsand according to thennmber and form of the inserted pieces. These piecesare inserted for the double purpose of carrying the operative mechanismand to stiffen the arm. The arm may be further strengthened by plates ofmetal riveted across the joint between the two sides, as the plate G,which has on its outer side bosses g and g, to corre spond with thebosses c and c on the piece E, which form journal-boxes, as required inthe form of head that this illustrates. This piece G is also shown ascarrying the boss 9', through which the horizontal shaft passes. Thehorizontal shaft also passes through the piece F. The tension deviceshould be liteted over and across the upper scam in the arm B, as shownin Figs. land 3,thus stiffening and strengthening that part of the arm.

The face plate O is struck up in the required form from sheet metal, andthe necessary parts for carrying the mechanism contained therein may beattached in any approved way.

It is obvious that heads may be constructed in. this way for any form ofsewing-machine,

ing the arm, said plate E having bosseseand e to form journal-boxes, andthe piece G, riveted across the rear adjacent edges of the 15 sides A Aand having bosses g, g, and g", forming journals for the necessaryshafting.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

- JOHN M. BROSIUS. Witnesses:

A. P. Woon, WILLIE KEITH.

